Silk Option Missing from Cloth in Psychics Tab
Cloth presets are just a script placed within the folder where blender is installed

/blender/blender version/scripts/presets/cloth/

create a new text document with the following:

import bpy

bpy.context.cloth.settings.quality = 5

bpy.context.cloth.settings.mass = 0.150

bpy.context.cloth.settings.structural_stiffness = 5

bpy.context.cloth.settings.bending_stiffness = 0.05

bpy.context.cloth.settings.spring_damping = 0

bpy.context.cloth.settings.air_damping = 1


and save the file as silk.py

Or just use those values on blender and save a new preset using the plus (+) sign on the presets.